Conversion formula

The conversion factor from feet to kilometers is 0.0003048, which means that 1 foot is equal to 0.0003048 kilometers:

1 ft = 0.0003048 km

To convert 4221 feet into kilometers we have to multiply 4221 by the conversion factor in order to get the length amount from feet to kilometers. We can also form a simple proportion to calculate the result:

1 ft → 0.0003048 km

4221 ft → L_(km)

Solve the above proportion to obtain the length L in kilometers:

L_(km) = 4221 ft × 0.0003048 km

L_(km) = 1.2865608 km

The final result is:

4221 ft → 1.2865608 km

We conclude that 4221 feet is equivalent to 1.2865608 kilometers:

4221 feet = 1.2865608 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 0.77726602582637 × 4221 feet.

Another way is saying that 4221 feet is equal to 1 ÷ 0.77726602582637 kilometers.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that four thousand two hundred twenty-one feet is approximately one point two eight seven kilometers:

4221 ft ≅ 1.287 km

An alternative is also that one kilometer is approximately zero point seven seven seven times four thousand two hundred twenty-one feet.

Conversion table

feet to kilometers chart

For quick reference purposes, below is the conversion table you can use to convert from feet to kilometers